How to install GLFW?

Hello.
I've no experience of OpenGL at all and have just begun today to try it out. A tutorial required me to install the GLFW, GLM and GLEW libraries to avoid manually writing boring long codes. And I've downloaded the latest versions.

I followed the instructions of the GLM (copying the header files) and GLEW (copying the .dll, .lib and header files).

I don't really understand the instructions for installation in the readme file and just simply copied the glfw.h to my computer's GL libraries. As a result, when I ran a piece of simple code, it gave me a bunch of "unresolved external symbol" errors.